“In Denmark they play traditional jazz” was an often heard expression in Sweden in the 1950’s and 60’s. Yes, indeed there were a lot of New Orleans inspired traditional jazz played everywhere in Denmark at that time and happily still is.
The Danes are well known to the world for playing the music in a tasteful and swinging manner. So it is no surprise that many of the jazz musicians from New Orleans like to visit their Danish colleagues to play and share their experiences with them. Some of the “veterans” have also made it an annual event.